jgkurz Posted August 27, 2008 Share Posted August 27, 2008 Hi All, Back when I was building my car I decided to use an intercooler from an Izusu NPR. It's the large NPR IC and I got it cheap. To date, I have had no complaints as it seems to be working very well. So far I've been able to get about 523 crank HP from my setup. I have no reason to believe the NPR IC is a weak link if I wanted more HP. I can measure my intake temps but that's really the only way I could compare to another IC. What do you think, should I stick with the NPR or is there going to be a noticeable temp drop with a new style IC? Here's what it looks like: Quote Link to comment Share on other sites More sharing options...
Evan Purple240zt Posted August 27, 2008 Share Posted August 27, 2008 Realistically, you will need to go to a good quality spearco etc.. if you want real improvements. I don't think a large chinese core would be any better than what you have. Besides temperature drop, there is pressure drop. If memory serves, there is quite a bit of pressure drop across that I/C. Evan Quote Link to comment Share on other sites More sharing options...
hughdogz Posted August 27, 2008 Share Posted August 27, 2008 Hi John, If you want a deal on a never-used Spearco same side inlet / outlet, I know of someone in the PDX area that is considering parting with one. Quote Link to comment Share on other sites More sharing options...
jgkurz Posted August 27, 2008 Author Share Posted August 27, 2008 Hi John, If you want a deal on a never-used Spearco same side inlet / outlet, I know of someone in the PDX area that is considering parting with one. I need the inlet and outlet on opposite sides... Quote Link to comment Share on other sites More sharing options...
JustinOlson Posted August 27, 2008 Share Posted August 27, 2008 I have a large 825hp precision intercooler you might be interested in trying. It might be too big to fit your car tho. Core is 27X10.5X3.5 I believe. 33" total width. Justin Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted August 28, 2008 Share Posted August 28, 2008 So far I've been able to get about 523 crank HP from my setup. You have 523 crank HP! holy freakn crap! wow man.. with your specs I wouldn't expect those numbers!! Quote Link to comment Share on other sites More sharing options...
jgkurz Posted August 28, 2008 Author Share Posted August 28, 2008 You have 523 crank HP! holy freakn crap! wow man.. with your specs I wouldn't expect those numbers!! Thanks.... I think. What HP would you have expected? Did you look at my website for the specs? On the dyno I made 454.99rwhp. To get my bhp, I calculated 15% drivetrain loss which is 523hp. I've seen some folks use a more generous % for drivetrain loss. I've always thought 15% was more accurate but I can't say for sure. Quote Link to comment Share on other sites More sharing options...
Bernardd Posted August 28, 2008 Share Posted August 28, 2008 Are you experiencing a large pressure drop? What are the IAT's like? IMO those two things determine if there is a need for an upgrade. Quote Link to comment Share on other sites More sharing options...
TrumpetRhapsody Posted August 28, 2008 Share Posted August 28, 2008 ^^ Agreed Your power levels sounds about right to me... that's a nice turbo. Man, Imagine what that thing would do with turbo headers, and a custom intake mani and larger throttle body Quote Link to comment Share on other sites More sharing options...
datsun723 Posted August 28, 2008 Share Posted August 28, 2008 hey, jus looked at your website and man i'm lovin the color of your Z 611 pride baby!! Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted August 28, 2008 Share Posted August 28, 2008 Well I guess it makes since.. 3.0L and an amazing turbo.. and a cam thats close to mine!! hmm.. I want!! lol Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted August 28, 2008 Share Posted August 28, 2008 If you can run an additional temporary gauge on the turbo side and compare the pressure on that side with the manifold pressure. That will give you some idea of your pressure drop. Mike Quote Link to comment Share on other sites More sharing options...
jgkurz Posted August 29, 2008 Author Share Posted August 29, 2008 Thanks everyone for your advice. I'm thinking for a pressure test I could use my Tec3 datalogger. On a stretch of road I could log pressure with the MAP sensor connected to the intake manifold (normal configuration). To test the pressure differential I could plumb the same hose to a location near outlet of the turbo. I would then log pressure a second time on the same stretch of road using the same acceleration and boost. This would likely cause a richer fuel condition since the EFI will think the engine is getting more boost then in reality. I don't view this as an issue. I suppose I could do the same thing with the IAT sensor for measuring temps. I'd just have to weld a bung somewhere in the plumbing before the I/C. Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted August 29, 2008 Share Posted August 29, 2008 Well you said it yourself. You don't think it's holding you back. Get some info on pressure drop. The biggest thing I look at as far as the core at it's limit is to datalog a couple hard pulls from zero to triple digits and watch the air temps - post IC. Quote Link to comment Share on other sites More sharing options...
hughdogz Posted August 30, 2008 Share Posted August 30, 2008 There must be some way to set up a manometer between each side of the I/C...but then recording it and keeping the fluid out of your engine may be challenging. John, doesn't your boost gauge have a recorded max indicator? You can hook that up on the I/C inlet side and keep your Tec3 datalogger as the outlet side. Then compare the difference in the recorded max pressures. I'd think that the pressure drop across the piping may be negligible. Not sure if it will work, since there may only be a few PSI pressure drop. The boost gauge is probably not as accurate as a MAP sensor (even though it is MAP-sensor based, the dial is analog). It would be interesting to see the results... Quote Link to comment Share on other sites More sharing options...
Six_Shooter Posted August 30, 2008 Share Posted August 30, 2008 Could also use two 2 BAR MAP sensors, tieing them into voltage reference, ground and then using a pair of DMMs, you can see how much difference there. record the max differences and then through calculations, come up with an actual pressure difference. Might even be able to set up gauge to show the difference. Quote Link to comment Share on other sites More sharing options...
hughdogz Posted August 30, 2008 Share Posted August 30, 2008 Could also use two 2 BAR MAP sensors, tieing them into voltage reference, ground and then using a pair of DMMs, you can see how much difference there. record the max differences and then through calculations, come up with an actual pressure difference. Might even be able to set up gauge to show the difference. You Genius ... Six_Shooter, I think that would work great. I believe there are two GM MAP sensors already installed. Quote Link to comment Share on other sites More sharing options...
Hyuri Posted August 30, 2008 Share Posted August 30, 2008 There's a series of articles at AutoSpeed that might be of interest as well: Part 1, Part 2, Part 3. They used a differential pressure gauge, but your dual MAP setup would probably work as well (caveat: calibration differences?). Quote Link to comment Share on other sites More sharing options...
jgkurz Posted August 30, 2008 Author Share Posted August 30, 2008 You Genius ... Six_Shooter, I think that would work great. I believe there are two GM MAP sensors already installed. I need one of my MAP sensors to run my EFI. The second MAP sensor is for my boost gauge. Some great idea's here. I need to get busy..... Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted August 31, 2008 Share Posted August 31, 2008 I have serious concerns about the validity of the results given the accuracy and precision of a typical auto pressure sensor. :-/ Quote Link to comment Share on other sites More sharing options...
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